Re: [libvirt] [PATCH 0/4] qemu: export disk snapshot capability
On 02/19/2014 01:09 AM, Francesco Romani wrote: - Original Message - This patch series extend the QEMU capabilities XML to report if the underlying QEMU binary supports, or not, the live disk snapshotting. Could please someone take a look and review this? Any comment would be really appreciated! ping Apologies for the delay. This series was submitted before the freeze, so I hope it's low enough risk to commit into 1.2.2 if the review goes well. I'm doing the review now... -- Eric Blake eblake redhat com+1-919-301-3266 Libvirt virtualization library http://libvirt.org signature.asc Description: OpenPGP digital signature -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
Re: [libvirt] [PATCH 0/4] qemu: export disk snapshot capability
On 01/17/2014 08:31 AM, Francesco Romani wrote: This patch series extend the QEMU capabilities XML to report if the underlying QEMU binary supports, or not, the live disk snapshotting. Without this patch series, the only way to know if QEMU has this support is to actually request a disk snapshot and to see what happens. The change is split in four patches: * patch #1 actually adds the new element in the QEMU capabilities XML. formatcaps.html.in wasn't very detailed about the actual XML format, so I've not updated it. Anyone feel free to point out what should be added, and I'll comply. The new element has the form disksnapshot default='value' toggle='off' because I'd like to convey two informations: - disk snapshot is supposed to be here, and it is (default='on') - disk snapshot is supposed to be here, and is NOT (default='off') Put in a different way, I tried to help the client as much as possible. I'm not particolary fond of this format, and I'm really open to alternatives here. Perhaps a simpler disksnapshot/ element can convey the same meaning? Suggestions welcome. Using merely disksnapshot/ is too terse - that element can only appear when qemu is new enough, but if it is absent, you don't know whether libvirt is new enough to tell you status but qemu is too old, or whether libvirt is too old to tell you status. The toggle='off' attribute is a bit much, but your choice of XML is at least consistent with other features (that is, seeing the disksnapshot element tells the client that this libvirt is new enough to support telling you the capability via the 'default=' attribute; where a missing disksnapshot is a sign of an older libvirt where you have to just try the command. The toggle='off' is a bit overkill, since it is not an option that can change state over the life of qemu or via any choice in the domain XML, but it is at least consistent with other feature capabilities, so a client can write a generic parser that handles all sorts of features, even the ones with toggle='yes' that can be overridden on a per-domain basis). * patches #2, #3 Are trivial and they provide the ground for the last patch which add a new unit tests. They are just dependencies for it. I tried to make them less invasive as possible. * patch #4 add a new unit test, aiming to test not only this new feature but also the whole XML capabilities test. I was under the impression that this kind of test do not really fit into existing one, so I added a new one. Suggestions about possible improvements for this test are welcome Thanks for adding tests as part of your submission, and again I apologize that no one has reviewed this for so long. -- Eric Blake eblake redhat com+1-919-301-3266 Libvirt virtualization library http://libvirt.org signature.asc Description: OpenPGP digital signature -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
Re: [libvirt] [PATCH 0/4] qemu: export disk snapshot capability
- Original Message - This patch series extend the QEMU capabilities XML to report if the underlying QEMU binary supports, or not, the live disk snapshotting. Could please someone take a look and review this? Any comment would be really appreciated! ping -- Francesco Romani RedHat Engineering Virtualization R D Phone: 8261328 IRC: fromani -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
Re: [libvirt] [PATCH 0/4] qemu: export disk snapshot capability
- Original Message - From: Francesco Romani from...@redhat.com To: libvir-list@redhat.com Cc: Francesco Romani from...@redhat.com Sent: Friday, January 17, 2014 4:31:47 PM Subject: [PATCH 0/4] qemu: export disk snapshot capability This patch series extend the QEMU capabilities XML to report if the underlying QEMU binary supports, or not, the live disk snapshotting. Without this patch series, the only way to know if QEMU has this support is to actually request a disk snapshot and to see what happens. Hi again! Could please someone take a look and review this? Any comment would be really appreciated! Thanks and best regards, -- Francesco Romani RedHat Engineering Virtualization R D Phone: 8261328 IRC: fromani -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
Re: [libvirt] [PATCH 0/4] qemu: export disk snapshot capability
- Original Message - From: Francesco Romani from...@redhat.com To: libvir-list@redhat.com Cc: Francesco Romani from...@redhat.com Sent: Friday, January 17, 2014 4:31:47 PM Subject: [libvirt] [PATCH 0/4] qemu: export disk snapshot capability This patch series extend the QEMU capabilities XML to report if the underlying QEMU binary supports, or not, the live disk snapshotting. ping? -- Francesco Romani RedHat Engineering Virtualization R D Phone: 8261328 IRC: fromani -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
[libvirt] [PATCH 0/4] qemu: export disk snapshot capability
This patch series extend the QEMU capabilities XML to report if the underlying QEMU binary supports, or not, the live disk snapshotting. Without this patch series, the only way to know if QEMU has this support is to actually request a disk snapshot and to see what happens. The change is split in four patches: * patch #1 actually adds the new element in the QEMU capabilities XML. formatcaps.html.in wasn't very detailed about the actual XML format, so I've not updated it. Anyone feel free to point out what should be added, and I'll comply. The new element has the form disksnapshot default='value' toggle='off' because I'd like to convey two informations: - disk snapshot is supposed to be here, and it is (default='on') - disk snapshot is supposed to be here, and is NOT (default='off') Put in a different way, I tried to help the client as much as possible. I'm not particolary fond of this format, and I'm really open to alternatives here. Perhaps a simpler disksnapshot/ element can convey the same meaning? Suggestions welcome. * patches #2, #3 Are trivial and they provide the ground for the last patch which add a new unit tests. They are just dependencies for it. I tried to make them less invasive as possible. * patch #4 add a new unit test, aiming to test not only this new feature but also the whole XML capabilities test. I was under the impression that this kind of test do not really fit into existing one, so I added a new one. Suggestions about possible improvements for this test are welcome Francesco Romani (4): qemu: export disk snapshot support in capabilities qemu: add function to fill capabilities cache qemu: export the virQEMUCapsInitGuest function. qemu: add unit tests for the capabilities xml .gitignore | 1 + docs/schemas/capability.rng| 6 + src/qemu/qemu_capabilities.c | 40 +++- src/qemu/qemu_capabilities.h | 4 + tests/Makefile.am | 10 +- tests/qemucaps2xmldata/all_1.6.0-1.caps| 142 ++ tests/qemucaps2xmldata/all_1.6.0-1.xml | 51 + tests/qemucaps2xmldata/nodisksnapshot_1.6.0-1.caps | 141 + tests/qemucaps2xmldata/nodisksnapshot_1.6.0-1.xml | 51 + tests/qemucaps2xmltest.c | 217 + 10 files changed, 655 insertions(+), 8 deletions(-) create mode 100644 tests/qemucaps2xmldata/all_1.6.0-1.caps create mode 100644 tests/qemucaps2xmldata/all_1.6.0-1.xml create mode 100644 tests/qemucaps2xmldata/nodisksnapshot_1.6.0-1.caps create mode 100644 tests/qemucaps2xmldata/nodisksnapshot_1.6.0-1.xml create mode 100644 tests/qemucaps2xmltest.c -- 1.8.4.2 -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
